{"id":"https://openalex.org/W2079036500","doi":"https://doi.org/10.1002/j.1537-2197.1996.tb12723.x","title":"Ultrastructure of the Spermatozoid of Lycopodium obscurum (Lycopodiaceae)","display_name":"Ultrastructure of the Spermatozoid of Lycopodium obscurum (Lycopodiaceae)","publication_year":1996,"publication_date":"1996-04-01","ids":{"openalex":"https://openalex.org/W2079036500","doi":"https://doi.org/10.1002/j.1537-2197.1996.tb12723.x","mag":"2079036500"},"language":"en","primary_location":{"id":"doi:10.1002/j.1537-2197.1996.tb12723.x","doi":"https://doi.org/10.1002/j.1537-2197.1996.tb12723.x","is_oa":false,"landing_page_url":"https://doi.org/10.1002/j.1537-2197.1996.tb12723.x","pdf_url":null,"source":{"id":"https://openalex.org/S205086949","display_name":"American Journal of Botany","issn_l":"0002-9122","issn":["0002-9122","1537-2197"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Botany","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5035827217","display_name":"Angel R. Maden","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I119443389","display_name":"East Tennessee State University","ror":"https://ror.org/05rfqv493","country_code":"US","type":"education","lineage":["https://openalex.org/I119443389"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Angel R. Maden","raw_affiliation_strings":["Department of Biological Sciences, Box 70703 East Tennessee State University  Johnson City Tennessee 37614\u20130703;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Biological Sciences, Box 70703 East Tennessee State University  Johnson City Tennessee 37614\u20130703;","institution_ids":["https://openalex.org/I119443389"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5036823648","display_name":"KAREN SUE RENZAGLIA","orcid":"https://orcid.org/0000-0002-1406-2646","observed_orcids":["https://orcid.org/0000-0002-1406-2646"]},"institutions":[{"id":"https://openalex.org/I110378019","display_name":"Southern Illinois University Carbondale","ror":"https://ror.org/049kefs16","country_code":"US","type":"education","lineage":["https://openalex.org/I110378019","https://openalex.org/I2801502357"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Karen Sue Renzaglia","raw_affiliation_strings":["Department of Plant Biology, Southern Illinois University, Carbondale, Illinois 62901-6509"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Plant Biology, Southern Illinois University, Carbondale, Illinois 62901-6509","institution_ids":["https://openalex.org/I110378019"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5028020866","display_name":"Dean P. Whittier","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I200719446","display_name":"Vanderbilt University","ror":"https://ror.org/02vm5rt34","country_code":"US","type":"education","lineage":["https://openalex.org/I200719446"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Dean P. Whittier","raw_affiliation_strings":["Department of General Biology, Vanderbilt University, Nashville, Tennessee 37235"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of General Biology, Vanderbilt University, Nashville, Tennessee 37235","institution_ids":["https://openalex.org/I200719446"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":2660,"currency":"USD","value_usd":2660},"apc_paid":null,"fwci":3.0088,"has_fulltext":false,"cited_by_count":14,"citation_normalized_percentile":{"value":0.9028597,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"83","issue":"4","first_page":"419","last_page":"419"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12359","display_name":"Fern and Epiphyte Biology","score":0.7103999853134155,"subfield":{"id":"https://openalex.org/subfields/1105","display_name":"Ecology, Evolution, Behavior and Systematics"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T12359","display_name":"Fern and Epiphyte Biology","score":0.7103999853134155,"subfield":{"id":"https://openalex.org/subfields/1105","display_name":"Ecology, Evolution, Behavior and Systematics"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11927","display_name":"Plant Reproductive Biology","score":0.17550000548362732,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11836","display_name":"Bryophyte Studies and Records","score":0.08879999816417694,"subfield":{"id":"https://openalex.org/subfields/1105","display_name":"Ecology, Evolution, Behavior and Systematics"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sperm-flagella","display_name":"sperm flagella","score":0.7049999833106995},{"id":"https://openalex.org/keywords/microtubule-cytoskeleton","display_name":"microtubule cytoskeleton","score":0.6110000014305115},{"id":"https://openalex.org/keywords/basal-bodies","display_name":"basal bodies","score":0.8709999918937683},{"id":"https://openalex.org/keywords/multilayer-structures","display_name":"multilayer structures","score":0.777999997138977},{"id":"https://openalex.org/keywords/plastids","display_name":"plastids","score":0.5889999866485596},{"id":"https://openalex.org/keywords/starch-granules","display_name":"starch granules","score":0.8870000243186951},{"id":"https://openalex.org/keywords/sperm-motility","display_name":"sperm motility","score":0.5389999747276306},{"id":"https://openalex.org/keywords/lycopodium-cernuum","display_name":"Lycopodium cernuum","score":0.7680000066757202},{"id":"https://openalex.org/keywords/selaginella","display_name":"Selaginella","score":0.8080000281333923}],"concepts":[{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.8307809829711914},{"id":"https://openalex.org/C87555872","wikidata":"https://www.wikidata.org/wiki/Q3141316","display_name":"Ultrastructure","level":2,"score":0.7341527938842773},{"id":"https://openalex.org/C2780723820","wikidata":"https://www.wikidata.org/wiki/Q1934178","display_name":"Nucleus","level":2,"score":0.7160906195640564},{"id":"https://openalex.org/C2777394570","wikidata":"https://www.wikidata.org/wiki/Q624488","display_name":"Lycopodium","level":2,"score":0.6708942651748657},{"id":"https://openalex.org/C105702510","wikidata":"https://www.wikidata.org/wiki/Q514","display_name":"Anatomy","level":1,"score":0.5336856245994568},{"id":"https://openalex.org/C176080148","wikidata":"https://www.wikidata.org/wiki/Q207604","display_name":"Apical cell","level":3,"score":0.4186725616455078},{"id":"https://openalex.org/C131151476","wikidata":"https://www.wikidata.org/wiki/Q809753","display_name":"Basal body","level":4,"score":0.4135352075099945},{"id":"https://openalex.org/C115811362","wikidata":"https://www.wikidata.org/wiki/Q189998","display_name":"Flagellum","level":3,"score":0.3984018862247467},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.30014467239379883},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.21137180924415588},{"id":"https://openalex.org/C95444343","wikidata":"https://www.wikidata.org/wiki/Q7141","display_name":"Cell biology","level":1,"score":0.20793914794921875},{"id":"https://openalex.org/C1491633281","wikidata":"https://www.wikidata.org/wiki/Q7868","display_name":"Cell","level":2,"score":0.15189716219902039},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"score":0.0},{"id":"https://openalex.org/C523546767","wikidata":"https://www.wikidata.org/wiki/Q10876","display_name":"Bacteria","level":2,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1002/j.1537-2197.1996.tb12723.x","doi":"https://doi.org/10.1002/j.1537-2197.1996.tb12723.x","is_oa":false,"landing_page_url":"https://doi.org/10.1002/j.1537-2197.1996.tb12723.x","pdf_url":null,"source":{"id":"https://openalex.org/S205086949","display_name":"American Journal of Botany","issn_l":"0002-9122","issn":["0002-9122","1537-2197"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Botany","raw_type":"journal-article"},{"id":"doi:10.2307/2446211","doi":"https://doi.org/10.2307/2446211","is_oa":false,"landing_page_url":"https://doi.org/10.2307/2446211","pdf_url":null,"source":{"id":"https://openalex.org/S205086949","display_name":"American Journal of Botany","issn_l":"0002-9122","issn":["0002-9122","1537-2197"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Botany","raw_type":"journal-article"},{"id":"pmh:oai:dc.etsu.edu:etsu-works-12545","doi":null,"is_oa":false,"landing_page_url":"https://dc.etsu.edu/etsu-works/11279","pdf_url":null,"source":{"id":"https://openalex.org/S4377196424","display_name":"Digital Commons - East Tennessee State University (East Tennessee State University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I119443389","host_organization_name":"East Tennessee State University","host_organization_lineage":["https://openalex.org/I119443389"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"ETSU Faculty Works","raw_type":"text"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G2071213091","display_name":"Spermatogenesis in Pteridophytes: Ultrastructure,           Differentiation and Phylogeny","funder_award_id":"9207646","funder_id":"https://openalex.org/F4320306076","funder_display_name":"National Science Foundation"}],"funders":[{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","ror":"https://ror.org/021nxhr62"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":27,"referenced_works":["https://openalex.org/W69376034","https://openalex.org/W1968834772","https://openalex.org/W1971279570","https://openalex.org/W1984026815","https://openalex.org/W2013339899","https://openalex.org/W2016765127","https://openalex.org/W2020345236","https://openalex.org/W2026219199","https://openalex.org/W2028833680","https://openalex.org/W2031469210","https://openalex.org/W2041568505","https://openalex.org/W2042865811","https://openalex.org/W2045807976","https://openalex.org/W2048652415","https://openalex.org/W2050211118","https://openalex.org/W2050610352","https://openalex.org/W2051118527","https://openalex.org/W2059531116","https://openalex.org/W2065570842","https://openalex.org/W2082064355","https://openalex.org/W2086473630","https://openalex.org/W2133796077","https://openalex.org/W2241010869","https://openalex.org/W2329717328","https://openalex.org/W2333834452","https://openalex.org/W2468298145","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W1974236672","https://openalex.org/W2020345236","https://openalex.org/W2065652334","https://openalex.org/W2593477613","https://openalex.org/W2086473630","https://openalex.org/W2314698195","https://openalex.org/W2006733101","https://openalex.org/W2036887230","https://openalex.org/W2004400958","https://openalex.org/W2769297084"],"abstract_inverted_index":{"Ultrastructural":[0],"observations":[1],"reveal":[2],"that":[3,18,171,185,212],"the":[4,22,25,51,54,60,63,68,72,82,90,102,105,119,126,136,147,150,157,175,196],"spermatozoid":[5],"of":[6,24,62,71,78,104,149,172,179,195,207,215],"Lycopodium":[7,180],"obscurum":[8],"is":[9,29,132,187],"crescent":[10],"shaped":[11],"and":[12,31,49,66,99,122,161,190,201,209,217],"contains":[13,162],"two":[14,93],"posteriorly":[15,124],"directed":[16],"flagella":[17],"are":[19,96,142],"inserted":[20],"at":[21,46,85,101],"front":[23,103],"cell.":[26,55],"The":[27,92,114,153],"nucleus":[28],"broad":[30],"elongated":[32,110,189],"with":[33,74,204],"a":[34,75,108],"narrow":[35],"posterior":[36],"projection":[37],"or":[38,145],"nuclear":[39,159],"diverticulum.":[40],"Spline":[41],"microtubules":[42],"(MTs)":[43],"number":[44],"180":[45],"their":[47],"maximum":[48],"provide":[50],"framework":[52],"for":[53,84],"These":[56],"MTs":[57,80],"extend":[58],"from":[59,170],"anterior":[61,121,130],"locomotory":[64],"apparatus":[65],"along":[67],"outermost":[69],"surface":[70,160],"nucleus,":[73,197],"central":[76],"shank":[77],"14\u201317":[79],"encircling":[81],"cell":[83,106,120,168,218],"least":[86],"one-third":[87],"gyre":[88],"beyond":[89],"nucleus.":[91,127],"basal":[94,198],"bodies":[95],"slightly":[97],"staggered":[98],"positioned":[100],"over":[107,125],"highly":[109],"multilayered":[111],"structure":[112],"(MLS).":[113],"MLS":[115],"extends":[116],"laterally":[117],"around":[118],"curves":[123],"One":[128],"large":[129,164],"mitochondrion":[131],"situated":[133],"subjacent":[134],"to":[135,182],"MLS,":[137,200],"while":[138],"numerous":[139,163],"small":[140],"mitochondria":[141],"scattered":[143],"near":[144],"among":[146],"lobes":[148],"single":[151],"plastid.":[152],"plastid":[154],"rests":[155],"on":[156],"inner":[158],"starch":[165],"grains.":[166],"This":[167],"differs":[169],"L.":[173],"cernuum,":[174],"only":[176],"other":[177],"species":[178],"examined":[181],"date,":[183],"in":[184,223],"it":[186],"more":[188],"has":[191],"an":[192],"anterior-posterior":[193],"orientation":[194],"bodies,":[199],"spline.":[202],"Comparisons":[203],"coiled":[205],"gametes":[206],"bryophytes":[208],"Selaginella":[210],"suggest":[211],"some":[213],"degree":[214],"coiling":[216],"streamlining":[219],"may":[220],"be":[221],"ancestral":[222],"archegoniate":[224],"spermatozoids.":[225]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2018,"cited_by_count":1}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2016-06-24T00:00:00"}
